1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aa94eb53e5c1182a2164763a0c848ad51395fde6eb03f42086b05b61dbbe42. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c566e9f9-084c-43e2-8b19-9b4ac34f6571.json and https://artists.proofprofile.net/proofs/artist/c566e9f9-084c-43e2-8b19-9b4ac34f6571.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
역류 (Original Television Soundtrack), Pt. 11
미워도 사랑해 (Original Television Soundtrack), Pt. 21